Asbestos-felt covering for boilers, steam-tubes, &amp;c.



E. LAMPRECH?. SESHDS FEL? SGVERHJG FR BOILERS, STEAM TUBES, &c.

[Application led July 15, 1899.)

Sierras Ferarri CARL LAMPBECHT, OF STETTIN, GERMANY.

@EEQEICAEQIS forming part of Letters Patent No. 664,873, dated January 1, 1901.

Application filed July 15,

1899. Serial No. 723,992. (No specimens.)

Be it known 'that l, LAMPRECHT, a subject ofthe lling of Prussia, German Emperor, e L resident of Stettin, in the Kingdom of German Empire, have invented a Improved AsoesioS-iielt Covering `ers, Steam-Tu" ses, Ship-T'Valls, and

of which the following is an exact on one side only or on both sides. The ribs j" of the upper layer c may run parallelto the ribs of the bottom layer or rectangular to the same. The ribs may also be arranged on one side only, running parallel and rectangular to each other, so as to form a grating. The asbestos may also be arranged in form of little bearers, of round or square form, upon the non. plate a. These felt plates a, being covered rese, t invention relates to an asbeseither on one side or on both sides with ribs'e, tcs-i .l overin g for boilers, steani-tubes,ship are manufactured from Wool or hair inA pieces nd the like. of one or two square meters and of a thick- -6o e feature of my invention is ness of ten to fifty millimeters. Then the l einpioy double felt coverings, which Whole is formed correspondingly to the Wall 5 snperposed and isolated by asbestos ribs of the boiler, tube, ship, or the like to which from each other and from the boiler-walls or the covering is to be applied. the like, so that hollow spaces are formed be- The diierent plates must be arranged one 65 tvv-een covers, allowing fresh air to enter aside the other, so that the whole oers a cool the covers. Giving to this the eoversmooth surface, the ribs leaning against the ingisof greater durability than tliefelt plates Walls. The first cover a, with its ribs e, is usually emp'oyed similar purposes. The -placed upon the wall of the tube Z. Above ribs and the hollow spaces between the Walls Y- this plate a second felt plate a is arranged, 7o of the respective object and the first cover which is ribbed on one side, the ribs e leanpreventthe conduction of heat to the outside. ing against the iirst layer of felt plate. IfI 5 parts isolated by the improved covering the plate d is ribbed on both sides, the plate never can be heated considerably, this being ct is not ribbed. In the same manner a felt a chief feature, as it is of great importance for some objects never to become hotfor instance, ammunition-rooms.

My invention will be more fully described reference to the accompanying drawin rc represents a cross-section of a tube ded with my improved covering. Fig. 2

on of the saine through lines a; L nig. l .vi

u th part out Fig. 3 is a .ier of boiler, partly in section, provided th my improved. covering on the outside. -i is a vertical section through line 3,/ y of ig. o.

o, a .felt plate provided on both sides with iayer of asbestos c and c, the bottoni layer being somewhat thicker than the upper iver c, l. The bottom layer b may also replacer by a layer of asbestos-board. Upon the layer l; are arranged bevel-ribs c in convenient intervals and running parallel to each other.

The ribs may be arranged either plate a, having ribs e on both sides, is appli-xi a second plate ce', having the ribs only on one side, is located above the first plate. The smooth surface of the second cover receives a metal cover m, as shown in both arrangements, this cover having the purpose-to protect the asbestos from the outside.

.Since the asbestos ribs e, as Well as the upper asbestos layer b, are bad conductors of heat, the heat of the boiler or the. tube cannot reach the first felt plate Pd, but circulates within the insulating-spaces d Without heating or charring the felt, Whilev the second felt tageously brought in communication with the outer air by perfor-ations p, Figs. 1 and 2, or holes o, Figs. 3 and LL, provided in the metal cover m. The atmospheric air entering the intermediate space t' cools the hot inner air to such an extent that the radiated heat is not able to heat the second felt Wall and to to the Wall of the boiler 7c to be covered, and

layer forms an intermediate space t', advanp influence Llxe surroundings 0f the boiler m' l Luhe wall l..

Hex-'ing Lluis fully lesel'ibeQ the nature of this In vent-ien, what I desire to Secure by Let` 13ers Fluent el the United States is A covering for steam-boilers and the like, censlstng 01" Supa-posed felt plates, asbestos rim, m'mngef Lo form spaces between the plates and Ll'leu'rticle L-o beoovered and au j Outer covering having openngs'to eeet communication wiLh the atm0spl1e1e,as set. foxLlL In wbnesewhereof I have hereunto Set my' hemd in presence of two Witnesses.

Y CARL LAMPREHT.

. Vfitnesses:

J'. .OBERLA'JEDEM CARL MEMS. 

